256196305 has 8 divisors (see below), whose sum is σ = 307668672. Its totient is φ = 204801648.

The previous prime is 256196299. The next prime is 256196309. The reversal of 256196305 is 503691652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256196305 - 2¹⁹ = 255672017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256196309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11907 + ... + 25576.

It is an arithmetic number, because the mean of its divisors is an integer number (38458584).

Almost surely, 2^256196305 is an apocalyptic number.

It is an amenable number.

256196305 is a deficient number, since it is larger than the sum of its proper divisors (51472367).

256196305 is a wasteful number, since it uses less digits than its factorization.

256196305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38855.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 256196305 is about 16006.1333556859. The cubic root of 256196305 is about 635.1226786763.

The spelling of 256196305 in words is "two hundred fifty-six million, one hundred ninety-six thousand, three hundred five".